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  <title>Get the decimal digit value of a decimal digit character</title>
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  <div id="layout-content"><div id="intlchar.chardigitvalue" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">IntlChar::charDigitValue</h1>
  <p class="verinfo">(PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">IntlChar::charDigitValue</span> &mdash; <span class="dc-title">Get the decimal digit value of a decimal digit character</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-intlchar.chardigitvalue-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="modifier">static</span> <span class="methodname"><strong>IntlChar::charDigitValue</strong></span>(<span class="methodparam"><span class="type"><span class="type">int</span>|<span class="type">string</span></span> <code class="parameter">$codepoint</code></span>): <span class="type"><span class="type">?</span><span class="type">int</span></span></div>

  <p class="para rdfs-comment">
   Returns the decimal digit value of a decimal digit character.
  </p>
  <p class="para">
   Such characters have the general category &quot;Nd&quot; (decimal digit numbers) and a Numeric_Type of Decimal.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-intlchar.chardigitvalue-parameters">
  <h3 class="title">参数</h3>
  <dl>
   
    <dt>
<code class="parameter">codepoint</code></dt>

    <dd>

     <p class="para">The <span class="type">int</span> codepoint value (e.g. <code class="literal">0x2603</code> for <em class="emphasis">U+2603 SNOWMAN</em>), or the character encoded as a UTF-8 <span class="type">string</span> (e.g. <code class="literal">&quot;\u{2603}&quot;</code>)</p>
    </dd>

   
  </dl>

 </div>


 <div class="refsect1 returnvalues" id="refsect1-intlchar.chardigitvalue-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   The decimal digit value of <code class="parameter">codepoint</code>,
   or <code class="literal">-1</code> if it is not a decimal digit character. Returns <strong><code>null</code></strong> on failure.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-intlchar.chardigitvalue-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="example-2490">
   <p><strong>示例 #1 Testing different code points</strong></p>
   <div class="example-contents">
    <div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">charDigitValue</span><span style="color: #007700">(</span><span style="color: #DD0000">"1"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">charDigitValue</span><span style="color: #007700">(</span><span style="color: #DD0000">"\u{0662}"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">charDigitValue</span><span style="color: #007700">(</span><span style="color: #DD0000">"\u{0E53}"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
   </div>

   <div class="example-contents"><p>以上例程会输出：</p></div>
   <div class="example-contents screen">
    <div class="cdata"><pre>
int(1)
int(2)
int(3)
</pre></div>
   </div>
  </div>
 </div>


 <div class="refsect1 seealso" id="refsect1-intlchar.chardigitvalue-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="intlchar.getnumericvalue.html" class="function" rel="rdfs-seeAlso">IntlChar::getNumericValue()</a> - Get the numeric value for a Unicode code point</span></li>
   </ul>
  </p>
 </div>


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